Strip ANSI escape color sequences from /latest log responses (#6319)

* Strip ANSI escape color sequences from /latest log responses

Strip ANSI sequences of CSI commands [1] used for log coloring from
/latest log endpoints. These endpoint were primarily designed for log
downloads and colors are mostly not wanted in those. Add optional
argument for stripping the colors from the logs and enable it for the
/latest endpoints.

[1] https://en.wikipedia.org/wiki/ANSI_escape_code#CSIsection

* Refactor advanced logs' tests to use fixture factory

Introduce `advanced_logs_tester` fixture to simplify testing of advanced logs
in the API tests, declaring all the needed fixture in a single place. # Please
enter the commit message for your changes. Lines starting

tests/api/test_dns.py

@@ -1,13 +1,12 @@
 """Test DNS API."""
 
-from unittest.mock import MagicMock, patch
+from unittest.mock import patch
 
 from aiohttp.test_utils import TestClient
 
 from supervisor.coresys import CoreSys
 from supervisor.dbus.resolved import Resolved
 
-from tests.api import common_test_api_advanced_logs
 from tests.dbus_service_mocks.base import DBusServiceMock
 from tests.dbus_service_mocks.resolved import Resolved as ResolvedService
 
@@ -66,15 +65,6 @@ async def test_options(api_client: TestClient, coresys: CoreSys):
         restart.assert_called_once()
 
 
-async def test_api_dns_logs(
-    api_client: TestClient, journald_logs: MagicMock, coresys: CoreSys, os_available
-):
+async def test_api_dns_logs(advanced_logs_tester):
     """Test dns logs."""
-    await common_test_api_advanced_logs(
-        "/dns",
-        "hassio_dns",
-        api_client,
-        journald_logs,
-        coresys,
-        os_available,
-    )
+    await advanced_logs_tester("/dns", "hassio_dns")